42935989 has 8 divisors (see below), whose sum is σ = 44047800. Its totient is φ = 41835456.

The previous prime is 42935987. The next prime is 42936001. The reversal of 42935989 is 98953924.

It can be written as a sum of positive squares in 4 ways, for example, as 4284900 + 38651089 = 2070^2 + 6217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42935989 - 2¹ = 42935987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42935987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5179 + ... + 10615.

It is an arithmetic number, because the mean of its divisors is an integer number (5505975).

Almost surely, 2^42935989 is an apocalyptic number.

It is an amenable number.

42935989 is a deficient number, since it is larger than the sum of its proper divisors (1111811).

42935989 is a wasteful number, since it uses less digits than its factorization.

42935989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639.

The product of its digits is 699840, while the sum is 49.

The square root of 42935989 is about 6552.5559135348. Note that the first 3 decimals coincide. The cubic root of 42935989 is about 350.1658778346.

The spelling of 42935989 in words is "forty-two million, nine hundred thirty-five thousand, nine hundred eighty-nine".